As a last minute addition, I added an assertion to make sure that the
new i915_vma view would be equal to the discard. However, the positive
encouragement from CI only goes to show that we rarely take this path,
and it wasn't until the post-merge run did we hit the assert.
Fixes: 9bdcaa5e3a2f ("drm/i915: Discard a misplaced GGTT vma")
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f1acd1889d37..41553e9e57a9 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -947,7 +947,8 @@ discard_ggtt_vma(struct i915_vma *vma, const struct i915_ggtt_view *view)
rb_erase(&vma->obj_node, &obj->vma.tree);
vma->ggtt_view = discard;
- GEM_BUG_ON(i915_vma_compare(vma, vma->vm, view));
+ GEM_BUG_ON(i915_vma_compare(vma, vma->vm, &discard));
+ GEM_BUG_ON(i915_vma_compare(vma, vma->vm, view) == 0);
rb = NULL;
p = &obj->vma.tree.rb_node;
--
2.20.1
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